FREE ABSTRACT (to read the full article, please log in below).
Control of liquid level is an important and common task in any process
industry. In this work, control of liquid level in a conical tank (nonlinear
in nature) with an actuator problem is studied. Proportional – Integral
(PI) controller is the commonly designed linear controller for controlling
liquid level in process industries. Since, the problem is nonlinear in
nature, an improvement in the tuning of parameters of the PI controller
is resorted. This work deals with the different methods to control the
liquid level in the conical tank, viz., weighted PI controller, fuzzy weighted
PI controller and neuro fuzzy tuned PI controller and are compared with
traditional PI controller. Real time experimental studies are carried out
for all the controllers to evaluate their performances in the control of
the liquid level of a conical tank. The performance is evaluated based
on a loss function namely, cumulative squared error.
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© Copyright 2002 Professor F.R. Hall - University of Wolverhampton.